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Western Hemisphere: Map


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Map showing all locations mentioned on Wikipedia article:

The geographical western hemisphere of Earth, highlighted in yellow.
Western hemisphere
The Western Hemisphere, also Western hemisphere or western hemisphere, is a geographical term for the half of the Earth that lies west of the Prime Meridian (which crosses Greenwichmarker in Londonmarker, Englandmarker, United Kingdommarker), the other half being the eastern hemisphere. It is also used to specifically refer to the Americas (or the New World) and adjacent waters, while excluding other territories that lie geographically in the hemisphere (parts of Africa, Europe, Antarcticamarker, and Asia); thus, it is sometimes referred to as the American hemisphere. Western hemisphere is sometimes used as an equivalent for the geopolitical construct, the Western world, which typically includes the Americas, Europe, Australia and New Zealandmarker.

Any definition of eastern and western hemispheres, however, requires the selection of an arbitrary meridian and a corresponding meridian on the other side of the Earth. The Prime Meridian at 0° longitude is typically used, which runs through Greenwich; this is used to define the International Date Linemarker (or End Meridian) on the other side of the Earth at 180° longitude. In its proper geographic sense, the western hemisphere includes not only the Americas, but the western portions of Europe and Africa, the easternmost tip of Russiamarker, numerous territories in Oceania, and a portion of Antarctica while excluding some of the Aleutian Islandsmarker to the southwest of the Alaskanmarker mainland. Sometimes, the meridians of 20° W and the diametrically opposed 160° E are used, which excludes the European and African mainlands but also excludes a small portion of northeast Greenlandmarker and includes more of eastern Russia and Oceania (e.g., New Zealandmarker).

The two major regions of Antarcticamarker are named after their positions mainly within a single hemisphere; West Antarcticamarker is named for the Western Hemisphere.

Countries common to both hemispheres

Below is a list of the countries which are in both the Western and Eastern hemispheres on the Prime Meridian, in order from north to south: Below is a list of the countries which are in both the Western and Eastern hemispheres along the 180th meridian, in order from north to south:

Countries in the Western Hemisphere but not in the Americas

The following countries lie outside the Americas (or New World) yet are in part or entirely within the Western Hemisphere.


  1. Oxford Dictionary of English, 2nd ed., rev. 2006. London, UK: Oxford University Press, p. 2001.
  2. Merriam Webster's Online Dictio some intereting fats about the western hepisphere are that a lot of nary (based on Collegiate vol., 11th ed.) 2006. Springfield, MA: Merriam-Webster, Inc.
  3. " Latitude and longitude" Encyclopædia Britannica. 2006. Chicago: Encyclopædia Britannica, Inc.
  4. Olson, Judy M. " Projecting the hemisphere", ch. 4 from Matching the map projection to the need; Robinson, Arthur H. & Snyder, John P., eds. 1997. Bethesda, MD: Cartography and Geographic Information Society, American Congress on Surveying and Mapping.
  5. "Western Hemisphere". Merriam-Webster's Geographical Dictionary, 3rd ed. 2001. Springfield, MA: Merriam-Webster, Inc., p. 1294.

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